Prediction of batch heat transfer coefficients for pseudoplastic fluids ...

.so
respectively..
These contradicting results may be results
of complex interactions between the geometrical dimensionless
groups.
As the v.Tidth of the impeller blade increases one
would expect the heat transfer coefficient to increase.
Pratt (149) reports
(2-41
where 1th.
is 1.Jidth of the impeller blade and
PH is the diameter of the coil helix.
Pursell (150) reports
(2-42
~vhere
Da is the impeller diameter.
Coil Geometry
Oldshue and Gretton (137)r>eport that lrlhen a coil is
used as the heat transfer surface the coil geometry is
important.
A i